Research progress of solid-state pure culture equipment and technology

Solid-state pure culture is a biotechnology that simulates the natural fermentation environment. It uses solid matrix such as rice, bran, soybean meal as the growth medium for industrial microorganisms to ferment and produce by single microbial strain under sterile conditions. Compared with liquid fermentation, its fermentation conditions are stricter, but it can improve the quality and yield of the product. In this paper, the types and principles of different solid-state fermentation reactors suitable for pure culture were introduced, the factors (temperature and heat transfer process, ventilation and mass transfer process, sterilization and inoculation process, and the water content and pH of the material) affecting the solid-state fermentation effect were summarized, the application of solid-state pure culture technology in fermented foods was elaborated, and the future research prospects of solid-state fermentation reactors were expected.